Standard Test Method for Water in Paints and Paint Materials by Karl Fischer Method

Importancia y uso:

4.1 Control of water content is often important in controlling the performance of paint and paint ingredients, and it is critical in controlling volatile organic compound (VOC) content.

4.2 Paint materials are often insoluble in common Karl Fischer solvents such as methanol. Pyridine has been found to be a nearly universal solvent for these materials; however, the Karl Fischer reaction is too slow in that solvent at room temperature. To speed it up, 1-ethylpiperidine is added at 5 % as a buffer, or “catalyst.”

4.3 For nonpyridine-based reagents, a number of different solvent systems are available to increase solubility and to minimize interferences from ketones and aldehydes.

Subcomité:

D01.21

Referida por:

D4143-16R22, D2827-19, D7358-07R18, D3451-24, E1868-10R21, D6266-00AR23, D6336-11R21, D6577-24, D5325-03R21, D6886-18, D7768-12R18, D6511_D6511M-18R24, D7270-07R21, D3960-05R18, E0203-24, D7245-09R21, D5530-22, D6763-16R22, E0203-24, D5324-16R22, D5146-10R19, E0203-24

Volúmen:

06.01

Número ICS:

87.040 (Paints and varnishes)

Palabras clave:

Karl Fischer reagent method; moisture content; water content;